<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
		<script>
		var div = document.createElement("dev");
		console.log(typeof(dev));
		div.innerHTML = '今天不压堂'
		div.style.cssText = 'height; 30px;color:hotpink'
		document.body.appendChild(div);
		</script>
	</head>
	<body>
		<button onclick="createRandomCode()">生成3位验证码</button>
		<div id="code"></div>
	</body>
</html>
